Suspended French steeplechaser Nordine Gezzar has launched a late legal bid to run on Friday at the London Olympics.
The Court of Arbitration for Sport says it will rule later on Thursday on his appeal against his exclusion from the French team.
The French athletics federation provisionally suspended Gezzar after he tested positive for the blood boosting hormone EPO at the national championships in June.
CAS says Gezzar "considers that errors were committed during the anti-doping control procedure" and wants to be entered in the 3,000 meters steeplechase heats.
Gezzar served a two-year suspension for doping in 2006 and faces a life ban if a second offense is proven.
The 32-year-old runner finished fourth at the European championships in June in Helsinki.